The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 17, 2017
Filed:
Nov. 29, 2012
Covestro Deutschland Ag, Leverkusen, DE;
Frank Richter, Leverkusen, DE;
Martin Anstock, Krefeld, DE;
Philip Bahke, Houston, TX (US);
Andreas Gosch, Bochum, DE;
Reinhard Halpaap, Odenthal, DE;
Andreas Hecking, Langenfeld, DE;
Sigurd Buchholz, Köln, DE;
Ursula Tracht, Leverkusen, DE;
Adrian Cosmin Dobre, Köln, DE;
Covestro Deutschland AG, Leverkusen, DE;
Abstract
A process for continuous preparation of oligomeric or polymeric isocyanates by catalytic modification of monomeric di- and/or triisocyanates, characterized in that at least one isocyanate component A and at least one catalyst component B are combined continuously in a reaction apparatus and conducted through the reaction apparatus as a reaction mixture, the residence time distribution being characterized according to the dispersion model by Bo (Bodenstein number) above 40, preferably above 60 and most preferably above 80.